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A rigid tank contains 20lbm of air at 80ºF and 35 psig. Heat is added until...

A rigid tank contains 20lbm of air at 80ºF and 35 psig. Heat is added until the pressure doubles to 70 psig. Rair = 0.3704 psia-ft3/lbm-R

  1. Draw the P-v and T-v diagrams for the problem.
  2. What is the volume of the tank ft3?
  3. What is final temperature of the air in ºF?
  4. How much heat is transferred in the process in Btu?
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